/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.api.java;

import org.apache.flink.annotation.PublicEvolving;
import org.apache.flink.api.common.JobExecutionResult;
import org.apache.flink.api.common.Plan;
import org.apache.flink.api.common.operators.CollectionExecutor;

/**
 * Version of {@link ExecutionEnvironment} that allows serial, local, collection-based executions of
 * Flink programs.
 */
@PublicEvolving
public class CollectionEnvironment extends ExecutionEnvironment {

    @Override
    public JobExecutionResult execute(String jobName) throws Exception {
        Plan p = createProgramPlan(jobName);

        // We need to reverse here. Object-Reuse enabled, means safe mode is disabled.
        CollectionExecutor exec = new CollectionExecutor(getConfig());
        this.lastJobExecutionResult = exec.execute(p);
        return this.lastJobExecutionResult;
    }

    @Override
    public int getParallelism() {
        return 1; // always serial
    }
}
